In the modern periodic table, elements are arranged in order
based on the number of in the nuclei of their atoms.

Protons

Explanation: Just got it right on the CK-12 assignment :)

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.